Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3d10f787dded6c…

MALICIOUS

PDF

52.5 KB Created: 2020-09-21 01:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e34bf366948b085aae3d290982471b SHA-1: 1a01191aec2a6202a819e2f626937fe07da68484 SHA-256: 8b3d10f787dded6c6e627dbe2f1a33de11cd0a7478f36d3a6d39d166234a00f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including a critical redirector link to 'ttraff.me' and a link farm pointing to various PDF files hosted on external domains. The document body, though partially corrupted, suggests a lure related to 'Ncaa basketball recruiting manual', aiming to entice users to click these malicious links. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=ncaa+basketball+recruiting+manual
    • http://tofotu.bigairmarketingproducts.com/uploads/1/3/0/7/130740019/wivizadisivakunetu.pdf
    • http://suriraz.basilyates.com/uploads/1/3/1/6/131606457/623440.pdf
    • http://mutexokun.revealedheart.com/uploads/1/3/1/4/131483154/xopobox.pdf
    • http://files.hoffmannlabradors.com/uploads/1/3/1/1/131163620/4654660.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/38178114659.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/temperate_forest_biome.pdf
    • https://21e4cd1a-bcbc-42b8-8dcc-f097c6bf734e.filesusr.com/ugd/120874_8f7460bd2dab46a388371de2ffaffe6a.pdf?index=true
    • https://5c5e4037-eb56-47b4-ad19-b8d0f96f0f9d.filesusr.com/ugd/7182f3_2a051093ec4f4dbc97981473e1bd9a8e.pdf?index=true
    • https://abca47a5-ca8e-4b28-805e-a8369e45d0c1.filesusr.com/ugd/c6ac46_a51de462b6ce467182c891708d445021.pdf?index=true
    • https://51833edb-4d57-48f5-a46d-c42d3132a53e.filesusr.com/ugd/1b0481_73cf4d5e64954a91901441763cd73004.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0437/5235/8042/files/pifukozawupotaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/vowokorexuwizilaxefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/sda_church_elders_manual.pdf
    • https://cdn.shopify.com/s/files/1/0472/3212/3045/files/fairy_tail_filler_blmler.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d3.bin
e9df1abf47a688c52bbf36275161d4c71dd3d5463c3e540779115c3c600865d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D3 3304 bytes
font_01_sfnt_off000084b9.bin
c19f9af7981aba3f0f66d565a158cce41327e95e2cb6c3a7014dcaa3c33143eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B9 5292 bytes
font_02_sfnt_off000096ad.bin
61340682128b75c29426db9b3161f3d8d132ae15199bb980fa8f8b022092df5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96AD 14564 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.